Day-7

Solved 8 questions of different languages from different platforms.

-https://practice.geeksforgeeks.org/problems/insert-a-node-in-a-bst/1
-https://www.hackerrank.com/challenges/30-binary-search-trees/problem
-https://www.geeksforgeeks.org/duplicates-removal-in-array-using-bst/?ref=leftbar-rightbar
-https://www.hackerrank.com/challenges/30-bitwise-and/problem
-https://www.geeksforgeeks.org/binary-search-tree-set-2-delete/?ref=lbp
-https://www.hackerrank.com/challenges/welcome-to-java/problem
-https://www.hackerrank.com/challenges/java-stdin-and-stdout-1/problem?h_r=next-challenge&h_v=zen
-https://www.hackerrank.com/challenges/java-if-else/problem?h_r=next-challenge&h_v=zen&h_r=next-challenge&h_v=zen